|Ar-39-Ar-40 of achondrites: Evidence for a lunar-like cataclysm - Bogard, D. D.|
The observation that the K-Ar, Pb-Pb, and Rb-Sr ages of a significant number of lunar highland rocks were reset in the interval of 4.1-3.8 Ga ago led to the concept of a cataclysmic bombardment of the moon during this period. An important consideration for understanding the early bombardment history of the solar system, including the moon, is whether evidence also exists in meteorites for resetting of radiometric ages by cataclysmic bombardment of their parent bodies...
Keywords: APERTURES; FREQUENCIES; MATHEMATICAL MODELS; SELECTIVE SURFACES; SPECTRAL METHODS; METAL SHEETS; METHOD OF MOMENTS; NUMERICAL ANALYSIS; SCATTERING
|Space Operations Analysis Using the Synergistic Engineering Environment - Angster, Scott|
The Synergistic Engineering Environment has been under development at the NASA Langley Research Center to aid in the understanding of the operations of spacecraft. This is accomplished through the integration of multiple data sets, analysis tools, spacecraft geometric models, and a visualization environment to create an interactive virtual simulation of the spacecraft. Initially designed to support the needs of the International Space Station, the SEE has broadened the scope to include spacecraf...
Keywords: SOLAR ENERGY ABSORBERS; NICKEL OXIDES; PLATINUM OXIDES; THERMAL ENERGY; SOLAR ENERGY; HIGH TEMPERATURE; COATINGS; SELECTIVE SURFACES; DURABILITY; INFRARED RADIATION; METAL OXIDES